X-haven Assistant is an unofficial helper app for the board games Gloomhaven, Frosthaven, and their derivatives. The app aims to be a good replacement for the no-longer-available Gloomhaven Helper by Esoteric Software. The focus is on providing a good user experience, and the app is designed to be like a board game component rather than a typical material style app.

The app is designed to minimize the need for user input, which is a key factor in providing a good user experience for a board game component. Therefore, most of the functionality is in one single screen, which may seem slightly busy at first glance, but is necessary to achieve the app's goal. X-haven Assistant is available for free on the Android platform.